Shearing dies for spring plates



J.A.FBAY.. SHEARING DIES FIOR SPRING PLATES.

APPLICATION FILED MAR. 29.1921.

Patented Aug. 22, 1922 MACHINE COMPANY, or anrnenrojar, oon'nncrrcnr.

' snizenrne nrns sons-Earns r A rnsQ a i To all whom it may concern:

Be it known that I, Lines A. F RAY, citizen of the United States, residing at Bridge port, in the county 'otF airfield and State of Connecticut, have invented certain new and useful Improvements in Shearing Dies for Spring Plates; and I' do hereby declare the following to be a full, clear, and eract description of the invention, such as will enable others skilled in the art to which it appertains, to make and use the same.

I This invention relates to shearing dies adapted for shearing spring plates, and it consists in so shaping the dies that two ends are simultaneously sheared from the body of a metal strip and the ends separated with out loss of stock.

Referring to the accompanying drawings; Figures 1 and2 represent inside views of the dies;

Figure 3 is a side elevation of the dies in operative position with. a broken view of a I strip and finished spring plate after the metal strip resting on the lower half of the die' i igure 4 is a front elevation of the dies in operative position, minus, the metal strip,

looking in the direction of arrow at, F ig ure 3;

Figure 5 is a view of thelower die showing the efiect of the shearing, broken view of the metal strip and finished spring plate;

Figure 6 is a central section of the lower die on line 6-6 of Figure 1, showing the finished spring plate severed from the metal strip and the end of the metal strip sheared,

and a Figure 7 is a broken view of the metal separation of the latter from the former.

The two parts of the complete die, shown in Figures 1 and 2, are provided with the base 1 and 2 adapted to be connected with a power press or other well known machine adapted for operating the dies.

While the two parts of the complete die are exactly alike, they will be designated by different figures and letters of reference in order to bring out more clearly their workable relation. 3 and 4, Figure 1, are tapered punch-like projections having the shearing edges 6, 0, (Z, c, 7, 9, while the projections 5, 6, have the shearing edges h, z, j, is, Z, m, n, 0.

When the two, parts of the die are 'assembled in operative position, the shearing one solid punch member respective punc die, sa1d transverse cuttmg edges bemgsub stantially 1n register with each otherso as I shearing edges 6, 0, Figure-1, and the shear JAMES A. PRAY, or BRIDGEPORT, oonnncrrour, nssrenon T0 ans ers & M nEnzrE,"

I Specificationof Letters Patent, Application filed March 29,1921. Serial No. 456 567; i v

ing edges 7', is, with the edges 0, n, and the edges 6, f, with the edges Z, m, and the shear? mg edge (Z with the edge I In operating the die in I be stationary and the other movable, and as both parts are alike it is immaterial as to which is used; as the upper or movablehalf, orthe lower or stationary half. Whichever half is used as, the lower or stationary member,

v 3 or 4 is preferably located at the work entrance of the die to form a support for a metal strip, in Fig-- ures 8, 1, 5, and 6, the punch member 3 being so located. y

In shearing theends and'cutting 'ofspring plates to any desired length, the end otthe metal strip 7 is placed upon the solidmemher and its end pointed by the die, then the strip is pieces" 8, 9, 10, and 11, are sheared 0E to form the tapered end 12 on the end of the 'metal'stripi, and the tapered end13 on the nished spring plate 14. The tapered end" 15 of the spring "plate having been previously sheared as before mentioned. At the I same time that the end. 13 of the spring plate and the end 12 of the metal strip are pointed, the spring plate '14; is severed from the metal strip on'the line 19 by the shear 6 parts of the die are reversed from the posi- 6 inclusive. Sevplate from the metal strip thus done without a tion shown in Figures 3 to ering the finished on the line ,1? is side pieces 8, 9, 10, and 11.

Having thus described my invention what I claim is 1. In a shearing die,an upper and a lower of the other, each die 6 die each a counterpart havingan inwardly tapered punch and each having transverse cutting edges at their inner ends, saidv dies each having inwardly tapered shearing es of the complementary advanced, "Figure 5, and the waste particle of waste, and the only'waste arethe recesses for receiving the I a common power press, one half wlll necessarily to cut the stock on a single transverse line which latter forms an end of each of the severed partsof the stock.

2. In a shearing die, an upper and a lower die, each die having a male and a female part, the male part of each die being received in the respective female part of the other die, each die having transverse shearture.

- I JAMES AFRAY. 

